ClipImageBorderView.java
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package com.hloong.clipheadicon;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
/**
*/
public class ClipImageBorderView extends View {
/**
* 水平方向与View的边距
*/
private int mHorizontalPadding;
/**
* 垂直方向与View的边距
*/
private int mVerticalPadding;
/**
* 绘制的矩形的宽度
*/
private int mWidth;
/**
* 边框的颜色，默认为白色
*/
private int mBorderColor = Color.parseColor("#eeeeee");
/**
* 边框的宽度单位dp
*/
private int mBorderWidth = 1;
private Paint mPaint;
public ClipImageBorderView(Context context) {
this(context, null);
}
public ClipImageBorderView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ClipImageBorderView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mBorderWidth = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, mBorderWidth, getResources()
.getDisplayMetrics());
mPaint = new Paint();
mPaint.setAntiAlias(true);
}
int mHeight ;
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// 计算矩形区域的宽度
mWidth = getWidth() - 2 * mHorizontalPadding;
mHeight = mWidth * ClipImageActivity.heightScale/ClipImageActivity.widthScale ;
// 计算距离屏幕垂直边界 的边距
mVerticalPadding = (getHeight() - mHeight) / 2;
mPaint.setColor(Color.parseColor("#aa000000"));
mPaint.setStyle(Style.FILL);
// 绘制左边1
canvas.drawRect(0, 0, mHorizontalPadding, getHeight(), mPaint);
// 绘制右边2
canvas.drawRect(getWidth() - mHorizontalPadding, 0, getWidth(),
getHeight(), mPaint);
// 绘制上边3
canvas.drawRect(mHorizontalPadding, 0, getWidth() - mHorizontalPadding,
mVerticalPadding, mPaint);
// 绘制下边4
canvas.drawRect(mHorizontalPadding, getHeight() - mVerticalPadding,
getWidth() - mHorizontalPadding, getHeight(), mPaint);
// 绘制外边�?
mPaint.setColor(mBorderColor);
mPaint.setStrokeWidth(mBorderWidth);
mPaint.setStyle(Style.STROKE);
canvas.drawRect(mHorizontalPadding, mVerticalPadding, getWidth()
- mHorizontalPadding, getHeight() - mVerticalPadding, mPaint);
}
public void setHorizontalPadding(int mHorizontalPadding) {
this.mHorizontalPadding = mHorizontalPadding;
}
}